'A centralised control computer for robots on land, air or sea' sounds suspiciously like the Terminator-wiki description of Skynet. But actually, it's just the SparkNotes version of the US Navy's latest test project, the Common Control System, which is going to kill us all.
Termed the "Common Control System", the master computer of doom is accessible from desktop or tablet applications, and can basically control any platform running the Navy's Universal Character Set software, a scary-arse bit of code that can "run on any type of platform or hardware, and can overlay existing systems running on propriety software to make them work with any others". In other words, even non-compliant machinery can be zombified into Skynet submission.
Doom-mongering aside, however, this indicates a major leap forward for military command-and-control systems. Given the proprietary nature of most military software, a 'universal control system' would improve the ability of different units to operate together.
Of course, tying all the military command-and-control systems to one giant computer systems gives hackers the juciest target in the history of electrons, so you hope it's well encrypted, otherwise it'll be the North Koreans and not Skynet ruining everyone's lunch. [US Navy via The Register]